<p dir="ltr">You can get the super accurate RTC module with battery. .. For pi and dweeno<br>
>From China. <br>
For less than I can buy the chip from farnell </p>
<p dir="ltr">One of them is guaranteed +/- 4 seconds a year !!!!!!!</p>
<div class="gmail_quote">On 28 Jan 2016 08:49, "Justin Mitchell" <<a href="mailto:justin@swansea.hackspace.org.uk">justin@swansea.hackspace.org.uk</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The date handling isnt all that hard that it would dictate the level of<br>
device needed, its just simple integer maths.<br>
<br>
my concerns would more be:<br>
a) what is the interface to the display, how much work is required in<br>
driving it ?<br>
<br>
b) where do you intend to get the current date from, a RTC module, or<br>
from the internet ?<br>
<br>
<br>
On Thu, 2016-01-28 at 08:26 +0000, Richard Morgan wrote:<br>
> It will track a single event - after that I might programme it for a<br>
> new date but it will be one date only.<br>
><br>
><br>
> I would specify the bank holidays to ensure it's counting down the<br>
> days accurately.<br>
><br>
><br>
><br>
> On Thursday, 28 January 2016, Ceri Clatworthy<br>
> <<a href="mailto:ceri.clatworthy@gmail.com">ceri.clatworthy@gmail.com</a>> wrote:<br>
> Are you going to specify bank holidays weekend etc.<br>
><br>
> If this is a ONE OFF then it probably is going to be fairly<br>
> simple.<br>
><br>
> But if it is for many events. . Bit more code.<br>
> Possibly a windows PC program to generate a data file on SD or<br>
> simmla<br>
><br>
> Ceri<br>
><br>
> On 28 Jan 2016 08:06, "Richard Morgan"<br>
> <<a href="mailto:richard.morgan@avocation.co.uk">richard.morgan@avocation.co.uk</a>> wrote:<br>
> Hi All,<br>
> I want to create a large office display 'countdown'<br>
> clock to a specific date...but...I want it to<br>
> countdown 'working days' and not just calendar days!!<br>
> =:-O<br>
><br>
><br>
> I would need to be able to programme in the<br>
> bank-holidays and weekends so that they can be<br>
> excluded and the 'days left number' is accurate as the<br>
> weeks progress...<br>
><br>
><br>
> It would need to be a large 3 digit LED display for<br>
> the days left countdown to be visible across the<br>
> office.<br>
><br>
><br>
> Ideally it would be something that I could run off a<br>
> re-chargeable battery pack for portability but<br>
> plugging in would be okay.<br>
><br>
><br>
> Would this be a Raspberry Pi project or would you<br>
> recommend an Arduino?<br>
><br>
><br>
> All suggestions very gratefully received...<br>
><br>
><br>
><br>
> Richard<br>
><br>
> _______________________________________________<br>
> Hackspace mailing list<br>
> <a href="mailto:Hackspace@swansea.hackspace.org.uk">Hackspace@swansea.hackspace.org.uk</a><br>
> <a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" rel="noreferrer" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a><br>
><br>
><br>
><br>
> --<br>
> Kind regards,<br>
><br>
> Richard<br>
> _______________________________________________<br>
> Hackspace mailing list<br>
> <a href="mailto:Hackspace@swansea.hackspace.org.uk">Hackspace@swansea.hackspace.org.uk</a><br>
> <a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" rel="noreferrer" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a><br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Hackspace mailing list<br>
<a href="mailto:Hackspace@swansea.hackspace.org.uk">Hackspace@swansea.hackspace.org.uk</a><br>
<a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" rel="noreferrer" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a><br>
</blockquote></div>